Solved
Bitcoin puzzle #54
Bitcoin puzzle #54 has been solved. Its private key is 236fb6d5ad1f43. The address originally held 0.54 BTC, which was swept by whoever found the key first.
Puzzle #54 at a glance
- Total received
- 0.54002 BTC
- Balance now
- 0.0 BTC
- Address
- 1KYUv7nSvXx4642TKeuC2SNdTk326uUpFy
- HASH160
- cb66763cf7fde659869ae7f06884d9a0f879a092
- Range start
- 20000000000000
- Range end
- 3fffffffffffff
- Bit length
- 54-bit
- Keys in range
- 9.00 × 1015 (9007199254740992)
- Transactions
- 5
The solved key
- Private key
- 236fb6d5ad1f43
- Decimal
- 9974455244496707
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjhHvuTMSDchRp5hktc
Verify it yourself: multiply this key by the secp256k1 generator point, compress the resulting public key, and take RIPEMD-160(SHA-256(·)). You get exactly the HASH160 above. This site performs that check on every published key at build time.
Puzzle #54 — common questions
How many private keys does Bitcoin puzzle #54 contain?
Puzzle #54 spans the range 2^53 to 2^54−1, which is exactly 9.00 × 10^15 private keys — twice as many as puzzle #53.
How long would it take to solve Bitcoin puzzle #54?
An eight-core machine running this browser solver at four million keys per second would need about 71 years to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 3 hours.
How much is Bitcoin puzzle #54 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.54002 BTC.
Is Bitcoin puzzle #54 solved?
Yes. Its private key is 236fb6d5ad1f43 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjhHvuTMSDchRp5hktc in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #54?
From 20000000000000 to 3fffffffffffff in hexadecimal. The address is 1KYUv7nSvXx4642TKeuC2SNdTk326uUpFy and its HASH160 is cb66763cf7fde659869ae7f06884d9a0f879a092.